CVE-2025-71311 (GCVE-0-2025-71311)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:24 – Updated: 2026-08-05 12:12
VLAI
Title
fs/ntfs3: Initialize new folios before use
Summary
In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: Initialize new folios before use KMSAN reports an uninitialized value in longest_match_std(), invoked from ntfs_compress_write(). When new folios are allocated without being marked uptodate and ni_read_frame() is skipped because the caller expects the frame to be completely overwritten, some reserved folios may remain only partially filled, leaving the rest memory uninitialized.
Severity
8.2 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 584f60ba22f79c89e6708ab82a5b5d9b8fa21fb2 , < dd6c81527d097b3b0bf5a15c2fdc9657d045144c (git)
Affected: 584f60ba22f79c89e6708ab82a5b5d9b8fa21fb2 , < 5a30cc03bde169ad558695b26da6ea7e55f6194a (git)
Affected: 584f60ba22f79c89e6708ab82a5b5d9b8fa21fb2 , < 41d79f8e2a36622d148719bf7c18b46ac1264284 (git)
Affected: 584f60ba22f79c89e6708ab82a5b5d9b8fa21fb2 , < f223ebffa185cc8da934333c5a31ff2d4f992dc9 (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.11
Unaffected: 0 , < 6.11 (semver)
Unaffected: 6.12.75 , ≤ 6.12.* (semver)
Unaffected: 6.18.14 , ≤ 6.18.* (semver)
Unaffected: 6.19.4 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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{
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    "cna": {
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          "product": "Linux",
          "programFiles": [
            "fs/ntfs3/file.c"
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              "value": "AV:N - A remote SMB or NFS client can reach ntfs3\u0027s write path when a compressed NTFS volume is exported by ksmbd or nfsd. Writable NTFS-backed network shares are a reasonable NAS/server deployment.\nAC:L - No race is required; the attacker controls the write offset and length and can reliably end a write inside a newly allocated compression frame.\nPR:N - ksmbd supports anonymous guest-writable shares, including compressed directories whose new files inherit compression, so exploitation can require no credentials.\nUI:N - Once the share and filesystem are available, the attacker can perform the write, EOF extension, and read without victim interaction.\nS:U - The disclosure and limited data corruption remain within the host kernel and its filesystem security authority.\nC:H - Unfilled portions of an 8\u201364 KiB frame contain stale allocator data but are compressed, persisted, and marked uptodate. Extending EOF and reading can expose substantial kernel or cross-process memory, and the process can be repeated.\nI:L - Uninitialized bytes can become file contents instead of the required zero-filled extension, causing limited and value-uncontrolled data modification. The bug does not provide an arbitrary kernel write or control-flow primitive.\nA:N - The compression code keeps pointers, indexes, and output sizes bounded, so the uninitialized values do not crash a normal kernel. A KMSAN diagnostic on specially instrumented kernels is not a production availability impact."
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-71311",
    "datePublished": "2026-05-27T12:24:02.532Z",
    "dateReserved": "2026-05-27T12:23:27.414Z",
    "dateUpdated": "2026-08-05T12:12:45.568Z",
    "state": "PUBLISHED"
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    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-28T12:03:54+00:00",
      "cve": "CVE-2025-71311",
      "id": "CVE-2025-71311",
      "initial_release_date": "2025-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: fs/ntfs3: Initialize new folios before use",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-71311.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-31T00:56:04Z",
      "cve": "CVE-2025-71311",
      "id": "CVE-2025-71311",
      "initial_release_date": "2026-05-28T04:01:20Z",
      "product_status:known_affected": "17",
      "product_status:known_not_affected": "278",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-71311",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-71311.json",
      "version": "5"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.